nebula-notebook@0.2.31
AI-native notebook computing environment — real Jupyter kernels, real filesystem, built to be driven by agents (Claude Code / Codex) via MCP
AI Security Review
scanned 2mo ago · by lpm-firewall-aiThis is not malicious install-hook abuse: the postinstall script exits for npm installations and there is no self-dependency chain. The package nevertheless exposes high-impact agent, token, and shell capabilities, so it warrants a warning for dangerous capability.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
The user starts the Nebula server and uses terminal or remote-agent features.
Impact
An authenticated user can grant a remote Nebula agent shell access and a reusable Nebula session token.
Mechanism
Creates terminal shells and forwards an authenticated token through a configured reverse SSH channel.
AI rationale
This is not malicious install-hook abuse: the postinstall script exits for npm installations and there is no self-dependency chain. The package nevertheless exposes high-impact agent, token, and shell capabilities, so it warrants a warning for dangerous capability.
Evidence
package.jsonscripts/postinstall.cjsnode-server/dist/terminal/pty-manager.jsnode-server/dist/terminal/server.jsnode-server/dist/terminal/remote-agent-identity.jsnode-server/dist/update-check.js.nebula/token.nebula/remote-agent.json.nebula/agents.json
Network endpoints1
127.0.0.1
Decision evidence
public snapshotAI called this Suspicious at 82.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- The running server can create login-shell terminal sessions.
- A protected remote-agent route forwards the caller's session token over SSH and writes it to the user's Nebula token path.
- The package includes agent and terminal control features with filesystem and command execution capability.
Evidence against
- The postinstall hook exits immediately when installed from npm under node_modules.
- There is no runtime dependency on nebula-notebook itself.
- The only identified external request is an opt-outable npm-registry update check; no exfiltration endpoint was found.
- No install-time mutation of AI-agent configuration occurs for npm consumers.
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShellWebSocket
HighEntropyStringsMinified
Source & flagged code
9 flaggedpackage.jsonView file
•scripts.postinstall = node scripts/postinstall.cjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.postinstall = node scripts/postinstall.cjs
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkgdist/assets/index-DbRuvtfE.jsView file
816patternName = generic_password
severity = medium
line = 816
matchedText = `),X=!0;...bar.
Medium
Secret Pattern
Package contains a possible secret pattern.
dist/assets/index-DbRuvtfE.jsView on unpkg · L816Findings
6 High6 Medium5 Low
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processbin/nebula-notebook.js
HighShell
HighCross File Remote Execution Contextbin/nebula-notebook.js
HighRuntime Package Installscripts/postinstall.cjs
HighSemantic Analysis Limiteddist/assets/index-BzgcJcvs.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumSecret Patterndist/assets/index-DbRuvtfE.js
MediumDynamic Requiredist/assets/index-BzgcJcvs.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowEval
Affected versions and remediation
This report applies to nebula-notebook@0.2.31.
See all versions of nebula-notebook for other recorded verdicts.
- Review the evidence and your use of nebula-notebook@0.2.31 before allowing it. Restrict the permissions described in this report.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
Evidence last updated: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.